Portion of footwear sole



FIG. 1 is a perspective view of a portion of footwear sole showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a front elevational view thereof.

The broken lines in FIGS. 1-6 are for disclosure purposes only and do not form part of the claimed design. The top view is unornamented and does not form part of the claimed design.

The broken lines adjacent to the surface shading along the periphery of the grooves define the boundary of the claimed design. 

The ornamental design for a portion of footwear sole, as shown and described. 